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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5038

Authors: Acocella, V.*
Neri, M.*
Walter, T. R.*
Title: Structural features of Panarea volcano in the frame of the Aeolian Arc (Italy): Implications for the 2002–2003 unrest
Title of journal: Journal of Geodynamics
Series/Report no.: /47 (2009)
Publisher: Elsevier Ltd
Issue Date: May-2009
DOI: 10.1016/j.jog.2009.01.004
URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V9X-4VDY84H-1&_user=5381242&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000067082&_version=1&_urlVersion=0&_userid=5381242&md5=bf5b1c1c12bb7a046b2205cd097544b1
Keywords: Panarea
Aeolian Arc
fault
dike
2002-2003 unrest
Abstract: Panarea, characterized by gas unrest in 2002–2003, is the volcanic island with the least constrained structure in the eastern-central Aeolian Arc (Italy). Based on structural measurements, we define here its deformation pattern relative to the Arc. The main deformations are subvertical extension fractures (63% of data), normal faults (25%) and dikes (12%). The mean orientation of the extension fractures and faults is ∼N38◦E, with a mean opening direction of N135◦ ±8◦, implying extension with a moderate component of dextral shear. These data, matched with those available for Stromboli volcano (pure opening) and Vulcano, Lipari and Salina volcanoes (predominant dextralmotions) along the eastern-central Arc, suggest a progressivewestward rotation of the extension direction and an increase in the dextral shear. The dextral shear turns into compression in the western arc. The recent unrest at Panarea, coeval to that of nearby Stromboli, may also be explained by the structural context, as both volcanoes lie along the portion of the Arc subject to extension.
Appears in Collections:Papers Published / Papers in press
04.01.99. General or miscellaneous
04.04.99. General or miscellaneous
04.04.09. Structural geology
04.07.99. General or miscellaneous
04.07.02. Geodynamics
04.07.04. Plate boundaries, motion, and tectonics
04.07.05. Stress
04.07.06. Subduction related processes
04.07.07. Tectonics
04.07.08. Volcanic arcs
04.08.99. General or miscellaneous
04.08.06. Volcano monitoring
04.08.08. Volcanic risk
05.02.03. Volcanic eruptions

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